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coasts - Coggle Diagram
coasts
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coastal management
groynes
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They don't stop longshore drift - they trap sand and pebbles being transported meaning they slow and reduce the migration of sediment through longshore drift.
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sea wall
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Expensive to build(£5,000 per m)
Can try to undermine the wall at the bottom - causes millions to fix - needs maintenance
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gabios
Cages of boulders are placed against the face of the cliff to protect the cliff from the force of the waves
They stabilize the cliff behind it
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